//
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Event;



public class Interaction extends java.applet.Applet {
   Color c=new Color(0,0,255);
   int dx=size().width;
   int dy=size().height;   

   public boolean mouseDown(Event e, int x, int y){
                   c= new Color(255,255,255);
           repaint(); 
       return true;    
   }
   public boolean mouseUp(Event e, int x, int y){
                   c= new Color(255,0,0); 
           repaint(); 
       return true;    
   }
   public boolean mouseDrag(Event e, int x, int y){
                   dx=x;
                   dy=y; 
           repaint(); 
       return true;    
   }
	 public void paint(Graphics g) {
             g.setColor(c);
             g.drawLine(0,0,dx,dy);
		}
}